function doPreload() {
var the_images = new Array(
'common/img/products2.gif',
'common/img/topics2.gif',
'common/img/contact2.gif',
'common/img/contact_m01_0.gif',
'common/img/contact_m01_1.gif',
'common/img/products_m01_0.gif',
'common/img/products_m01_1.gif',
'common/img/products_m02_0.gif',
'common/img/products_m02_1.gif',
'common/img/topics_m01_0.gif',
'common/img/topics_m01_0.gif'
);
preloadImages(the_images);
}

function preloadImages(the_images_array) {
  for(loop = 0; loop < the_images_array.length; loop++) {
    var an_image = new Image();
    an_image.src = the_images_array[loop];
  }
}